A simple delayed power-off circuit

I've put a simple delayed power-off circuit into my system. Keeps it powered for about 10 minutes after I've taken the key out of the ignition. Cheap & effective. This issue has come up before here, so if anyone's interested, here's a diagram & description: http://www.astron.nl/~smirnov/poweroff.html
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Fully custom Linux-based system on an '89 VW GTI 16V Wolfsburg Edition
Dual in-dash CD-ROMs, jogdial volume control, Sony joystick on the steering column, IR remote...
and still more HP than MHz

[This message has been edited by Oms (edited 10-26-2000).]

Custom Linux system on an '89 VW GTI 16V Edition One
Jogdial volume control, Sony joystick, IR remote...
Used to be the fastest Linux on the road, until all these NOS types came along...